v0.4.0

• Additional stats for STATUS command
• Interactive prompt using Linenoise
• PING command
• Torches now power blocks above them
• Wire can go up and down blocks
• Wire now power blocks
• Memory efficient block storage
• Blocks can now be removed by setting them to EMPTY
• Repeater block that delays a redstone signal and can be locked
• Comparator block that combine or negates signals
• Piston block that moves the block in front of it forwards and backwards
• Refactored CLI tests into multiple files
• Better benchmarks